Critical Current Properties of c-Axis Oriented Bi(Pb)2223 Bulks Sintered under High Gas Pressures

被引：3

作者：

Obata, K. ^{[1
]}

Shimoyama, J. ^{[1
]}

Yamamoto, A. ^{[1
]}

Ogino, H. ^{[1
]}

Kishio, K. ^{[1
]}

Kobayashi, S. ^{[2
]}

Hayashi, K. ^{[2
]}

机构：

[1] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[2] Sumitomo Elect Ind Ltd, Konohana ku, Osaka 5540022, Japan

来源：

SUPERCONDUCTIVITY CENTENNIAL CONFERENCE 2011 | 2012年 / 36卷

关键词：

high tempepature superconductor; Bi2223; bulk; high J(c); over pressure sintering; magnetic grain alignment technique;

D O I：

10.1016/j.phpro.2012.06.264

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Enhancement of J(c) performance of Bi(Pb)2223 bulks was attempted by sintering under controlled over pressures (CT-OP) and c-axis grain orientation. Relative density of bulks increased up to 93% with an increase of total gas pressure during the sintering. In addition, improvement of grain coupling by CT-OP sintering was indicated from normal state resistivity. Reflecting these facts, the bulks sintered by the CT-OP method showed higher J(c) than the bulks sintered under ambient pressure. On the other hand, magnetic grain alignment technique was adopted to achieve c-axis grain orientation. The c-axis oriented bulks showed higher J(c) than randomly oriented bulks. The observed J(c) of 2.3 x 10(4) Acm(-2) (20 K, 1 kOe) was very high value as for Bi(Pb) 2223 sintered bulks. (C) 2012 Published by Elsevier B. V. Selection and/or peer-review under responsibility of the Guest Editors.

引用

页码：665 / 668

页数：4

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